Assignee
Inventors
- Takeshi Adaniya (12 patents)
- Yoshinori Yomura (15 patents)
- Naoyuki Ooniwa (5 patents)
- Yoshihiko Yasue (20 patents)
- Hiroshi Kagechika (17 patents)
- Tadahiko Mishima (7 patents)
- Hiroshi Ishikawa (263 patents)
US Patent 4978588 · Granted Dec 18, 1990